Flexible Electronic Patch Utilizing Gelatin Film for Heart and Brain Signal Detection

Area of Science:

• Biomedical Engineering
• Materials Science
• Wearable Electronics

Background:

• Flexible electronic patches are crucial for monitoring cardio-brain signals but face challenges with adhesion and performance in humid environments.
• Existing technologies struggle to provide accurate, long-term monitoring compatible with physiological conditions.

Purpose of the Study:

• To engineer a novel flexible electronic patch with enhanced adhesion and detection capabilities for cardio-brain signaling.
• To address the limitations of current flexible patches in mildly humid environments and ensure biocompatibility.

Main Methods:

• Developed a flexible patch using a gelatin hydrogel cross-linked with a biocompatible matrix factor.
• Incorporated a blend of liquid metal and polyvinylpyrrolidone (PVP) into the gelatin matrix.
• Evaluated the patch's biocompatibility, conductivity, fatigue resistance, and monitoring functionality over 3 weeks.

Main Results:

• The engineered patch demonstrated excellent biocompatibility and fatigue resistance (10,000 cycles).
• The liquid metal provided conductivity, while the gelatin hydrogel ensured minimal toxicity and good adhesion.
• The patch maintained monitoring functionality even in mildly humid conditions and during prolonged implantation (3 weeks).

Conclusions:

• The novel gelatin-based flexible electronic patch offers a promising solution for accurate and durable cardio-brain signal monitoring.
• This innovation advances the development of wearable electronic devices for long-term biomedical applications.
• The patch's design overcomes key limitations, paving the way for future improvements in flexible electronics for health monitoring.